Hard sudoku — printable sheet 4
Four hard puzzles, one page. Answer key: view answers.
4
1
5
4
6
2
5
6
8
1
8
8
2
5
4
7
3
1
9
7
3
4
2
1
9
8
4
5
3
2
6
1
7
4
2
9
7
5
7
3
2
7
9
4
1
1
6
5
9
4
6
7
1
5
1
6
7
8
5
8
3
2
9
3
4
7
9
8
8
1
5
4
6
2
8
8
4
9
3
1
3
7
5
9
6
5
2
1
9
6
7
4
5
3
8
5
6
9
3
4
5
1
Sheet 4 of 20 · all hard sheets